Even easier, if you're using Firefox, get the ImageShack plugin. You can upload online images to ImageShack with a right click menu option or use the toolbar to upload local images and resize them to the acceptable 800px width. Spits out the appropriate BBCode for you as well.

_________________"All PPK gamers should put on their badge of shame right now. You will never leave the no-sex thread." - Vantine"I'm so glad my prison of principles has wifi." - Abelskiver